In Order to Test the Following Hypotheses at An $\alpha$ Level of Significance
H₀

In order to test the following hypotheses at an $\alpha$ level of significance
H₀: $\mu$ $\leq$ 800
H_a: $\mu$ > 800

The null hypothesis will be rejected, if the test statistic z is

A) $\geq$ z $\alpha$ .
B) < z _$\alpha$ .
C) < -z _$\alpha$ .
D) = $\alpha$ .